It's not that BC2 is a lot harder, it is just a lot different. Where MW2 is a lot of run and gun, BC2 seems to require a bit of a more strategical approach. Not saying the MW2 doesn't but, if you run and gun on BC2 you are going to die a lot.
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Corv1nusJul 12 '10 at 0:52

2 Answers
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Play to the strengths of the class you're playing. These rules bend a lot but you'll learn that with experience.

Assault - Drop ammo packs near teammates. Pick off guys at medium distance. Long distance works well too but that's best effective on defense. Shoot your grenade launcher at bunched up enemies.

Engineer - Repair friendly vehicles, blow up enemy vehicles. Shoot vehicles with the RPG-7, shoot soldiers with the Carl-Gustav. The CG does less damage but the rocket travels faster and has a wider damage radius. Your SMG is best used at close range.

Any class can use the tracer dart, but here's how to lock onto it. Once it's on the vehicle, look down the sight of your RPG at the red blinking square in the direction of the beacon. Once it stop blinking, you have about two seconds to shoot. You can even shoot straight in the air to curve it around buildings and terrain. You don't need line of sight to lock on. You do not need to stay aiming until it hits. Once it's locked, it's locked, but the next time you shoot you'll need to lock again.

Medic - Drop med kits near teammates. Revive dead teammates with your paddles (they appear as lightning bolts on the map and your HUD). Your light machine gun doesn't do much more damage than other guns but you have quite a bit more ammo per magazine. Best for medium distances.

Recon - Throw your motion mines, this reveals enemies in a small area as blips on you and your teammates maps. Use C4 to blow up vehicles that get too close (you can't throw them very far) and use mortar strikes to disperse camping enemies. Mortar strikes don't damage the M-Coms in Rush, but C4 does. Motion mines can also be an excellent offensive tool for rushing a building.

Spot. Push the spot button like you're on crack. (Back on 360, Select on PS3, Q on PC) This puts a blip over the enemies' heads and on the map. This can also be very useful if visibility is low due to smoke or if you're not used to iron sights, since the blip is drawn on top of your weapon.

Don't drive vehicles until you have some experience. This includes the UAV. It's fun, but you're not as invulnerable as you may feel and you can get blown up very quickly. Blow up a few before you drive one. You can practice flying helicopters in empty servers. You do not want to crash a helicopter full of teammates.

Don't snipe. It takes a good sniper to be a benefit to the team. The problem is everyone wants to snipe and too many snipers on a team probably accounts for 20% of losses. In my opinion, sniping is most useful to your team at medium ranges since you can use your motion mines.

This might be a given to some, but don't camp, especially when you're attacking. Camping is staying in the same spot for more than a few minutes. The longer you stay in one spot, the more likely the enemy is going to find you and throw a grenade your way or otherwise kill you. Be a moving target both in firefights and in the long term.

Spawn on your squadmates. You can spawn directly behind them by selecting them in the spawn menu. If the server allows you to see your squadmate before spawning then make sure he's not in too hot of a situation before you die alongside him and waste a ticket.

Shoot in short bursts. Each shot adds to the spread cone of your bullets. Just pretend it's a pistol and click a lot.

BC2 uses bullet simulation instead of traces. So at long distances you'll need to aim high and lead (aim in front of) your target.

First, I hope you've played at least the first few missions in single player :)

I'd say that Conquest mode is the easier of the two modes to get started with -- you're less likely to be thrown into a hugely-stacked game since even an outclassed team can still sneak around and capture a control point.

As far as a starting role goes: medics are everybody's best friend. Bind keys (or extra mouse buttons, anything easy to reach) to the gadgets so you can very quickly switch to the defibrillator tool and revive your squadmates. Drop a medkit behind cover, near your squadmates. Most importantly -- stick with your squad, watch their backs, and if everybody dies there's no shame in hiding in cover so they can respawn on your position. The XP you will earn from keeping your squad alive can get massive, especially at lower ranks.

Alternatively, if you're playing a vehicle-heavy map like Atacama Desert, engineers are a valuable asset. Repair, repair, repair and lob rockets at anything that can shoot back.

Finally, and this applies to all roles: Spot. With a single key press (Q by default on PC) the enemy you're looking at, no matter how far away, will be lit up for all of your team to see. You can't pound on the key all the time -- there's a hidden "cooldown" timer to prevent spamming -- but every little bit counts, and there's great satisfaction to be had in spotting a sniper and immediately seeing all sorts of little bits of metal flying in his direction :)

Great answer thanks! I should have mentioned (not by just a tag) that I have the game on PS3. But thanks anyway.
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Dmitry SelitskiyJul 8 '10 at 1:54

I am a beginner and I found Conquest mode extremely difficult to start with, especially if your team is filled with beginners like you: You can't drive/fly anything properly, and on foot you get killed too fast by choppers and camper tanks. I am playing squad rush and getting the feel of the maps and the weapons first.
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DrFishJan 26 '11 at 11:21